City lawmakers targeting Airbnb want to triple the size of a special task force that focuses on illegal rentals offered by the online service, The Post has learned.

The $2 million spending plan by the City Council’s Progressive Caucus seeks to add at least 25 staffers to the Mayor’s Office of Special Enforcement.

The plan will be presented Thursday at a preliminary budget hearing held by the Public Safety Committee.

The OSE is responsible for cracking down on illegal hotel operations, but it has just 12 assigned workers.

The multi-agency task force has a host of other quality-of-life duties that include shutting down bootleg merchandise bazaars, shady nightclubs and “notorious adult-use locations.”

Since its establishment in 2006 by then-Mayor Mike Bloomberg, the office’s budget has shrunk from nearly $1 million to about $96,000 in Mayor Bill de Blasio’s preliminary fiscal 2016 budget.

Proponents of an expansion say it could practically pay for itself through fines for building-code and fire safety violations.

“This plan will ensure that New York City has a smart enforcement framework to hold Airbnb and other illegal hotel operators accountable,” Councilwoman Helen Rosenthal (D-Manhattan) said.

The facts are simple: Most Airbnb hosts share only the home in which they live, and it’s just wrong to lump regular New Yorkers in with large-scale illegal hotels.

- Airbnb spokesman Nick Papas

“The staffing level at OSE is good enough for reactive — but not good enough for proactive — enforcement.”

Under state law, it’s illegal to rent out an apartment for less than 30 days unless the primary resident is also staying there.

But an investigation by state Attorney General Eric Schneiderman found that nearly three-quarters of all city apartment listings on Airbnb’s website violated that rule.

The $2 million budget proposal would fund three separate investigative teams, with inspectors pulled from the Buildings Department, FDNY and other city agencies.

In addition to responding to complaints from the public, the task force would employ a “certified database administrator” to identify lawbreakers by analyzing data gleaned from Airbnb and similar sites.

“Despite whatever claims Airbnb has made that resident hosts are the majority of rental listings, this is 100 percent false,” Councilman Mark Levine (D-Manhattan) said.

De Blasio spokeswoman Amy Spitalnick said, “We look forward to discussing the council’s priorities through the budget process,” but she insisted, “We have a strong enforcement apparatus to pursue complaints of illegal hotel activity.”

Airbnb spokesman Nick Papas said, “The facts are simple: Most Airbnb hosts share only the home in which they live, and it’s just wrong to lump regular New Yorkers in with large-scale illegal hotels.”